Hi Lusthansa,
check your personal messages !
I did the windproblem-thing when I worked on the whole file. I donīt know how much you are into Excel - by clicking on one of the fields with the numbers in it you can see the actual calculation formula in the top line below the symbolline.
I deleted the rest of the formulas which could be found beside the windcalculation though .
brgds, atcfalcon